Compress Image Between 20KB and 50KB — Free, Fast & Private
A form that asks for "between 20 and 50 KB" is setting a floor as well as a ceiling. Many sites reject a file that is too small as firmly as one that is too large, because a very small file is taken to mean an unreadable picture. This page opens the compressor in JPEG, aimed at the 50 KB ceiling, and is plain about the one thing it does not do. Photographs for form fields usually sit in this band, which is also where a phone image has to give up the most: a typical camera file is many times larger than the ceiling, so the encoder works near its limits and the result tends to sit close to 50 KB.
What the tool does, and what it does not
The compressor takes a ceiling: it searches for the highest quality at which the file is still under 50 KB, which tends to leave the result close to the ceiling, not far below it. That is the right behaviour for a range, because the highest quality that fits is also the file most likely to sit above the floor. But the image compressor has no floor setting: it will not enlarge a file to reach 20 KB, and it does not pad one with filler data. A picture whose own best encode is already below the floor stays below it.
Who asks for 20 to 50 KB
In the exam documents MiniPx has checked, this is the photograph band — the passport-style picture on the banking and state-commission forms — and it also holds thumb impressions and a few signature fields. Each row is read from the conducting body's own notice and links the page that enforces it.
| Exam | Document | Stated size | Checked |
|---|---|---|---|
| IBPS PO / Clerk (CRP-XVI) | Photograph | 20–50 KB | 2026-10-05 |
| IBPS PO / Clerk (CRP-XVI) | Thumb impression | 20–50 KB | 2026-10-05 |
| SBI PO / Clerk 2026 | Photograph | 20–50 KB | 2026-10-05 |
| SBI PO / Clerk 2026 | Thumb impression | 20–50 KB | 2026-10-05 |
| RRB (ALP, NTPC, Group D) | Signature | 30–49 KB | 2026-10-05 |
| TNPSC (2025–26 notifications) | Photograph | 20–50 KB | 2026-10-06 |
| TGPSC 2026 | Signature | 20–30 KB | 2026-10-06 |
Fitting a face into 50 KB
A head-and-shoulders photograph carries far more detail than a signature — skin texture, hair, the edges of clothing — so this is the band where the ceiling usually binds. Crop to the face and shoulders before compressing: pixels outside the frame cost bytes and add nothing a form checks. A plain, light background helps twice, because flat areas encode cheaply and photo specifications commonly ask for one anyway. If the picture still will not fit at a quality you are happy with, the tool reduces the dimensions, and a passport-size photograph does not need a phone camera's full resolution to show at its intended size.
What fits in 50 KB — measured on this page
We dropped five real files on the compressor above and kept what it handed back. 5 of 5 came out under 50 KB; 3 were made smaller in pixels to get there, because past a point the bytes can only come from pixels.
| File | Before | After, on this page | Under 50 KB? |
|---|---|---|---|
| 12 MP phone photo | 4032 × 3024 px · 3.73 MB | 2016 × 1512 px · 39.4 KB | Yes |
| Portrait / headshot | 3264 × 4653 px · 2.25 MB | 2611 × 3722 px · 46.8 KB | Yes |
| Scanned handwritten page | 3349 × 4281 px · 2.17 MB | 2143 × 2740 px · 46.8 KB | Yes |
| Scanned signature | 2041 × 617 px · 109.1 KB | 2041 × 617 px · 48.6 KB | Yes |
| Screenshot (PNG) | 1280 × 800 px · 88.1 KB | 1280 × 800 px · 48.6 KB | Yes |
Measured 2026-10-06 in Chromium 145.0.7632.6 with this page’s own settings. The photos are public-domain and CC0 files from Wikimedia Commons; the screenshot is our own. Sizes read as the tool shows them (1 KB = 1,024 bytes); the target itself is 50,000 bytes, which is under 50 KB on either reading.
Of the 5 real files in that table, 5 finished inside the range, between 20 KB and the ceiling..
If the result is under 20 KB
Read the measured size on the result screen before you download. If it is under 20 KB, the source picture is simply small, and the honest fix is a better source: a higher-resolution photograph or scan gives the encoder more to keep.
Exam forms that print a minimum are a different case: MiniPx's exam pages enforce the size band the exam states, floor included, using quality only and never padding. the IBPS photo page and the SBI photo page show one; the band they read from the exam's own document is 20–50 KB.
Decimal kilobytes
KB here is 1,000 bytes. A file inside the range by this count is inside it for a portal that counts 1,024-byte kilobytes too, except for a file within a few percent of the floor, where it is worth checking.